Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	$ (949,142)
Foreign currency translation adjustment (CTA) gain (loss)	454,269	$ (507,420)	$ (186,763)
Unrealized gain (loss) on cash flow hedges(1)	(54,895)	19,551	4,550
Net investment hedge CTA gain (loss)(1)	(235,292)	45,505	4,484
Unrealized gain (loss) on available for sale securities(2)	14	2,249	(40)
Net actuarial loss on defined benefit plans(3)	(143)	32	1,153
Net Change	163,953	(440,083)	(176,616)
AOCI, net of tax ending balance	(785,189)	(949,142)
Foreign currency translation adjustment (CTA) loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(1,031,129)	(523,709)	(336,946)
Foreign currency translation adjustment (CTA) gain (loss)	454,269	(507,420)	(186,763)
AOCI, net of tax ending balance	(576,860)	(1,031,129)	(523,709)
Unrealized gain (loss) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	30,704	11,153	6,603
Unrealized gain (loss) on cash flow hedges(1)	(54,895)	19,551	4,550
AOCI, net of tax ending balance	(24,191)	30,704	11,153
Net investment hedge CTA gain (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	49,989	4,484	0
Net investment hedge CTA gain (loss)(1)	(235,292)	45,505	4,484
AOCI, net of tax ending balance	(185,303)	49,989	4,484
Unrealized gain (loss) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	2,110	(139)	(99)
Unrealized gain (loss) on available for sale securities(2)	14	2,249	(40)
AOCI, net of tax ending balance	2,124	2,110	(139)
Net actuarial loss on defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(816)	(848)	(2,001)
Net actuarial loss on defined benefit plans(3)	(143)	32	1,153
AOCI, net of tax ending balance	(959)	(816)	(848)
Comprehensive income
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(949,142)	(509,059)	(332,443)
Net Change	163,953	(440,083)	(176,616)
AOCI, net of tax ending balance	$ (785,189)	$ (949,142)	$ (509,059)